Products
Silicon carbide refractory brick
Silicon Carbide Refractory Bricks I. Product Types and Classification Standards Oxide-Bonded Type (SC-O): SiC content 70–80%, silicate-bonded phase 15–20%; bulk density 2.5–2.7 g/cm³; service temperature ≤1350°C Nitride-Bonded Type (SC-N): Si₃N₄/Si₂N₂O bonding phase 20–30%; SiC content ≥85%; high-temperature strength (at 1400°C) ≥30 MPa Self-Bonded Type (SC-RB): Recrystallized silicon carbide (SiC ≥99%); apparent porosity ≤15%; thermal conductivity 120 W/(m·K). New Composite Products: Gradient Structure—working face SiC 95% → transition layer 80% → matrix layer 65%; nano-SiC coating (wear resistance improved by 50%). II. Advanced Production Processes Raw Material Processing System: SiC particle size grading (3–1 mm : 1–0.1 mm : <0.1 mm = 4:3:3); surface modification of silicon nitride powder (D50 = 0.8 μm); intelligent forming processes, including isostatic pressing (pressure 200–250 MPa) and 3D printing for precision shaping of complex components; special sintering technologies such as atmosphere-protected sintering (N₂, 1800–2200°C) and spark plasma sintering (SPS), which reduces the sintering cycle by 80%; post-processing techniques including chemical vapor deposition (CVD) for surface densification and laser precision machining with tolerances of ±0.1 mm. III. Core Application Areas in 2026 Industry Applications Typical Components Performance New Energy Lithium-Ion Battery Sintering Furnaces: Roller rods’ service life extended to 5 years Electronic Materials Silicon Carbide Single-Crystal Growth Furnaces: Crucibles—thermal field uniformity improved by 30% Environmental Protection Hazardous Waste Incinerators: Lining—corrosion resistance enhanced by 60% Aerospace Rocket Engine Nozzles: Temperature resistance up to 2000°C IV. Comparative Performance Advantages vs. Traditional Materials Thermal Conductivity: 120 W/(m·K) (high-alumina bricks only 2.1); Wear Resistance: Volumetric wear ≤0.5 cm³ (ASTM C704); Thermal Shock Resistance: 50 cycles (water quenching at 1100°C); Economic Indicators Initial Cost: 40% lower than zirconia-corundum bricks; Maintenance Interval: 8–10 years (traditional materials 3–5 years). V. Physicochemical Specifications (GB/T 2026–SC) 1. Basic Properties (SC-N Type): — Bulk Density: 2.7–2.9 g/cm³ — Apparent Porosity: 12–15% — Cold Crushing Strength: ≥150 MPa High-Temperature Characteristics: — Load Softening Point (0.2 MPa): ≥1650°C — Flexural Strength (at 1400°C): ≥35 MPa Special Properties: — Resistance to Molten Aluminum Erosion: ≤1.2 mm/100 h (at 900°C) — Coefficient of Thermal Expansion: 4.5 × 10⁻⁶/°C (20–1000°C)
Sintered zirconia-alumina brick
Sintered Zirconia–Alumina Refractory Bricks I. Main Product Types Standard Type (AZS-33): ZrO₂ content: 33±2% (stabilized); Al₂O₃: 45–50%; SiO₂ ≤16%; bulk density: 3.8–4.0 g/cm³ High-Density Type (AZS-HD): apparent porosity ≤12% (produced by ultra-high-pressure forming); glass erosion resistance improved by 40%; thermal shock resistance: ≥25 cycles (water quenching at 1100℃). 2025 New Gradient Composite Brick—Sandwich Structure: Working Face: 40% ZrO₂ + α-Al₂O₃ nanolayer; Transition Layer: mullite network structure; Backing Layer: porous corundum. II. Intelligent Production Processes Raw Material Pre-treatment: Plasma decomposition of zircon sand (ZrO₂ purity ≥99.5%); microwave activation of industrial alumina (α-phase conversion rate ≥95%); digital forming—isostatic pressing (300 MPa, ±0.3 mm accuracy); 3D printing of complex-shaped components (minimum wall thickness 3 mm); low-carbon firing technology—hydrogen-fueled tunnel kiln (1750℃ ±5℃); waste-heat power generation system (energy consumption reduced by 30%). III. Core Application Areas Application Industries Typical Components Technical Benefits Optoelectronic Displays High-alumina glass melting furnace—flow channel life 8–10 years New Energy Photovoltaic glass—tin bath energy consumption reduced by 25% Aerospace Rocket engine linings—temperature resistance up to 2200℃ Environmental Hazardous Waste Melting Furnaces—slag resistance improved by 60% IV. Performance Advantages Compared with Traditional Electrofused Bricks Thermal Shock Resistance: 35 cycles vs. 15 cycles Dimensional Accuracy: ±0.2 mm vs. ±1.0 mm Carbon Emissions: 1.2 tCO₂/t vs. 2.8 tCO₂/t Economic Analysis Initial Cost: 40–50% lower than electrofused AZS Maintenance Interval: 7 years without major overhauls V. Latest Physicochemical Specifications 1. Basic Properties (AZS-33): — Refractoriness: ≥1790℃ (GB/T 7322-2025) — Compressive Strength: ≥150 MPa (ISO 10059-2:2026) High-Temperature Characteristics: — Load Softening Point: ≥1700℃ (0.2 MPa) — Glass Erosion Resistance: ≤1.0 mm/24 h (1500℃) Special Indicators: — Thermal Conductivity: 2.3 W/(m·K) (1000℃) — Radioactivity: Internal Radiation Index ≤0.5
Heavy-duty mullite shaped brick
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa; Composite Reinforced Type (New Technology 2025): Addition of 5–8% nano-ZrO₂, improving thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic Pressing (200–250 MPa); Online X-ray Flaw Detection (100% defect detection rate); Hydrogen-Fired Sintering Technology: Full-Oxygen Combustion Tunnel Kiln (1750°C ±5°C), reducing carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields and Service Locations: Performance Highlights Ceramic Industry: Roller Kiln Supporting Structure—Service Life Extended to 5 Years; Chemical Industry: Ethylene Glycol Reactor Lining—Corrosion Resistance Improved by 40%; New Energy: Lithium-Battery Material Sintering Kiln—Energy Consumption Reduced by 18%; Aerospace: Rocket Exhaust Deflector—Temperature Resistance Up to 1850°C. IV. Performance Advantages Compared with Traditional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (1600°C for 50 hours); Economic Analysis: Initial Cost—50% Lower than Electrofused Mullite Bricks; Maintenance Interval—3 Years Without Major Overhaul (vs. 2 Years for Conventional Bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Room-Temperature Compressive Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali Corrosion Resistance (K₂O): Weight Gain ≤0.8% (1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (2.45 GHz)
Sintered Heavy-Duty Mullite Brick
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina raw material); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa; Composite Reinforced Type (New Technology 2025): Addition of 5–8% nano-ZrO₂, improving thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic Pressing (200–250 MPa); Online X-ray Nondestructive Testing (100% defect detection rate); Hydrogen-Fired Sintering Technology: Full-Oxygen Combustion Tunnel Kiln (1750°C ±5°C), reducing carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields | Component | Performance Highlights Ceramic Industry | Roller Hearth Kiln | Load-Bearing Structure | Service Life Extended to 5 Years Chemical Industry | Ethylene Glycol Reactor Lining | Corrosion Resistance Improved by 40% New Energy | Lithium-Ion Battery Material Sintering Kiln | Energy Consumption Reduced by 18% Aerospace | Rocket Exhaust Deflector | Temperature Resistance Up to 1850°C IV. Performance Advantages Compared with Traditional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (1600°C for 50 hours); Economic Analysis: Initial Cost: 50% lower than electrofused mullite bricks; Maintenance Interval: 3 years without major overhauls (vs. 2 years for traditional bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Cold Crushing Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali Resistance (K₂O): Weight Gain ≤0.8% (1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (2.45 GHz)
Sintered Heavy-Duty Mullite Refractory Bricks I. Main Product Types Standard Type (ML-70): Composition: Al₂O₃ 68–72%, SiO₂ 25–28%; Bulk Density: 2.6–2.8 g/cm³; Apparent Porosity: ≤18%; High-Purity Type (ML-80): Al₂O₃ ≥78% (using industrial-grade alumina); Load Softening Temperature: ≥1700°C; High-Temperature Flexural Strength (at 1400°C): ≥12 MPa. Composite Reinforced Type (New Technology 2025): Incorporation of 5–8% nano-ZrO₂, enhancing thermal shock resistance to 35 cycles (water quenching at 1100°C) and reducing thermal conductivity by 20%. II. Intelligent Production Process Raw Material Preprocessing: AI-based sorting of high-alumina bauxite (Al₂O₃ ±0.5%); Pre-synthesis of mullite (1600°C for 4 hours); Digital Forming System: Isostatic pressing at 200–250 MPa; Online X-ray Nondestructive Testing (100% defect detection rate); Hydrogen-fueled firing technology using full-oxygen combustion in a tunnel kiln (1750°C ±5°C), reducing the carbon footprint by 30% compared with conventional kilns. III. Typical Applications in 2026 Application Fields and Service Locations: Performance Highlights— Ceramic Industry: Roller Kiln load-bearing structure lifespan extended to 5 years; Chemical Industry: Ethylene glycol reactor lining exhibits 40% improved erosion resistance; New Energy: Lithium-ion battery material sintering kiln energy consumption reduced by 18%; Aerospace: Rocket exhaust nozzle shroud withstands temperatures up to 1850°C. IV. Performance Advantages Compared with Conventional High-Alumina Bricks Thermal Shock Resistance: 25 cycles vs. 8 cycles (water quenching at 1100°C); High-Temperature Creep: 0.3% vs. 1.2% (at 1600°C for 50 hours); Economic Analysis: Initial Cost: 50% lower than electrofused mullite bricks; Maintenance Interval: 3 years without major overhauls (compared with 2 years for conventional bricks). V. Physicochemical Specifications (GB/T 2026–ML) 1. Basic Properties (ML-70): – Refractoriness: ≥1790°C – Room-Temperature Compressive Strength: ≥80 MPa High-Temperature Characteristics: – Load Softening Point: ≥1650°C – Coefficient of Thermal Expansion: 5.5×10⁻⁶/°C (20–1000°C) Special Indicators: – Alkali-Erosion Resistance (K₂O): Weight Gain ≤0.8% (at 1400°C for 100 hours) – Microwave Loss: tanδ ≤0.001 (at 2.45 GHz)
Magnesia Refractory Bricks I. Main Product Types Magnesia Bricks (MZ Series): Composition: MgO ≥ 90%, CaO ≤ 2.5%; Properties: Refractoriness ≥ 2000°C, thermal shock resistance 15–25 cycles; Bulk density: 2.8–3.0 g/cm³. Magnesia–Carbon Bricks (MT Series): Composite composition: MgO 60–80%, C 10–20%; Special process: addition of antioxidant (Al/Si alloy); High-temperature strength: flexural strength at 1600°C ≥ 15 MPa. Magnesia–Alumina Bricks (MA Series): Composition ratio: MgO 70–85%, Al₂O₃ 10–20%; Thermal shock resistance: ≥ 30 cycles (water quenching at 1100°C). II. Modern Production Processes Raw Material Processing System: Electrofused magnesia sand grading (grades 97, 98, and 99); Intelligent ore blending (MgO variation ≤ 0.3%); Composite bonding technology with organic binders: phenolic resin + pitch; Inorganic binders: magnesium sulfate + phosphates; Intelligent firing control in ultra-high-temperature tunnel kilns (1850–1950°C); Firing curve: # Optimized firing program if temperature < 800°C: heating rate 60°C/h; elif 800–1600°C: controlled reducing atmosphere; else: constant-temperature stage with ±5°C accuracy. III. Core Applications Application Fields Typical Equipment Technical Benefits Steel metallurgy converter lining life ≥ 5000 heats; Nonferrous metals—copper flash smelting furnace slag erosion resistance improved by 40%; Environmental protection and energy—waste incineration furnace alkali corrosion resistance ≥ 2 years; Building materials industry—cement rotary kiln transition zone thermal shock stability 35 cycles. IV. Performance Advantages Compared with Traditional Materials Refractoriness: 2000°C vs. high-alumina brick 1790°C; Slag resistance: R₂O erosion rate reduced by 60%; High-temperature strength: 1600°C, compressive strength retention ≥ 80%; Economic Benefit Analysis Initial cost: 50–60% lower than chrome-corundum bricks; Consumption per ton of steel: 0.8–1.2 kg/t (converter application). V. Latest Physicochemical Specifications (GB/T 2026-MG) 1. Basic Properties: – Bulk density: 2.9–3.2 g/cm³ (MT series); – Apparent porosity: ≤ 16% (MA series). High-Temperature Characteristics: – Load-softening temperature: ≥ 1700°C (0.2 MPa); – Slag resistance (CaO/SiO₂ = 3): ≤ 1.2 mm/24 h. Special Indicators: – Oxidation resistance (1400°C/5 h): weight gain ≤ 1.5%; – Hydration resistance: wet-heat test ≥ 95%.
Direct-bonded magnesia-chrome brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C). Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Resistance to alkali erosion improved by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Copper-smelting furnace slag line—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kiln transition zone—thermal consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass-furnace heat-storage chamber—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|------------------------|------------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free product); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesia-chrome refractory brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Copper-smelting furnace slag line—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kiln transition zone—thermal consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass-furnace regenerator—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|-----------------------|-----------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free product); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesium-Iron-Aluminum Composite Brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Precision finishing of dimensions (tolerance ±0.3 mm). Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Pre-synthesis of spinel (1600°C); Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering (nitrogen protection). Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased by 3 times; Excellent creep resistance at 1700°C. Magnesia-Zirconium Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Resistance to alkali erosion improved by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Transition zone in cement kilns—reduced thermal consumption by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Heat-storage chamber in glass furnaces—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|-----------------------|-----------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C). Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤ 1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Transition zone in cement kilns—reduced thermal consumption by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Heat-storage chamber in glass furnaces—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|------------------------|------------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1800°C, chromite ore at 1600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1750–1850°C for 24 hours); Precision finishing of dimensions (tolerance ±0.3 mm). Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Cement kilns—transition zone; Heat consumption reduced by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Glass furnaces—heat-storage chambers; Maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|-----------------------|-----------------------| | Load-Softening Point (°C) | ≥1700 | ≥1650 | ≥1680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
Magnesium-aluminum spinel brick
Technical Specifications for Alkaline Refractory Bricks—Magnesia-Chrome Bricks Main Type: Direct-Bonded Magnesia-Chrome Brick (MG-15) Composition: MgO 60–70%, Cr₂O₃ 12–18% Characteristics: Direct-bonding ratio ≥85% at 1,700°C; Thermal-shock resistance: ≥30 cycles (water quenching at 1,100°C) Electrofused Re-bonded Magnesia-Chrome Brick (MGR-20): Electrofused synthetic material content ≥80%; Apparent porosity ≤14%; Slag penetration resistance improved by 50%. Production Process: Pre-sintering of raw materials (magnesia sand at 1,800°C, chromite ore at 1,600°C); High-pressure forming (300–400 MPa); Ultra-high-temperature firing (1,750–1,850°C for 24 hours); Dimensional finishing with precision ±0.3 mm. Technical Specifications for Magnesia-Alumina Bricks Innovative Type: Spinel-Reinforced (MA-85): MgO 80–85%, Al₂O₃ 10–15%; Spinel phase ≥25%; Thermal conductivity: 2.1 W/(m·K). Gradient Composite Magnesia-Alumina Brick: Working face—corundum coating (100 μm); Transition layer—MgO/Al₂O₃ = 70/30; Backing layer—porous structure (porosity 30%). Key Processes: Spinel pre-synthesis at 1,600°C; Nano-scale batching (D50 ≤1 μm); Atmosphere-controlled sintering under nitrogen protection. Technical Specifications for Magnesia-Zirconia Bricks New Product: Zirconia-Toughened (MZ-10): ZrO₂ 8–12% (sub-micron grade); Fracture toughness increased threefold; Excellent creep resistance at 1,700°C. Magnesia-Zirconia Composite Brick (MZ-20): MgZrO₃ as the primary crystalline phase; Enhanced alkali-corrosion resistance by 60%; Life-cycle cost reduced by 40%. Application Comparison and Analysis: Optimal Application Scenarios and Economic Benefits Magnesia-Chrome Brick: Slag line in copper smelting furnaces—service life 12–18 months (compared with the conventional 8 months). Magnesia-Alumina Brick: Transition zone in cement kilns—reduced thermal consumption by 0.8 GJ per ton of clinker. Magnesia-Zirconia Brick: Heat-storage chamber in glass furnaces—maintenance interval extended to 5 years. Physicochemical Performance Comparison (GB/T 2026): | Indicator | Magnesia-Chrome Brick | Magnesia-Alumina Brick | Magnesia-Zirconia Brick | |-------------------------|-----------------------|------------------------|------------------------| | Load-Softening Point (°C) | ≥1,700 | ≥1,650 | ≥1,680 | | Thermal-Shock Resistance (cycles) | 30 | 35 | 25 | | Slag Penetration (mm) | ≤1.5 | ≤2.0 | ≤1.0 | Environmental Indicators: - Hexavalent chromium leaching: ≤0.07 mg/L (new chromium-free products); - Heat recovery rate: ≥75% (recycling of waste bricks).
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